Colistin Sulfate USP from Mexico
Colistin sulfate (polymyxin E) is a last-resort antibiotic for multi-drug resistant Gram-negative infections. Bulk API powder imports under HTS 2941.90.50.00 as other antibiotics. Qualifies as pure chemically defined compound under Chapter 29 notes.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Nephrotoxicity profile and batch potency testing mandatory
• EU vs USP monograph differences require harmonized CoA
• Critical drug status accelerates FDA review but heightens scrutiny